• Title/Summary/Keyword: Attitude Control System

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A Case Study on the District Standard Planning Applied to Single-Detached House Area of Eomsa District Dooma-Myun Nonsan in Chungnam Province (충남 논산 두마면 엄사지구 단독주택지에 적용된 지구단위계획실태조사연구)

  • Kim, Joon-Yeoul;Choi, Hyo-Seung
    • Journal of the Korean Institute of Rural Architecture
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    • v.3 no.3
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    • pp.47-55
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    • 2001
  • For several years by discussion and research, the designing plan and detail plans of year 2000 has been unified. By this result the District Standard Planning as well as the following existing town to control all sorts of living surrounding problems and to make a delightful arranged town are the purpose, which is carrying out all over the country. It is true that the expectation was high to the District Standard Planning. Because of this plan it could use and control the District special quality. Such as, it could rise the ability of beautiful sight and make a advisable town. But in this study the first preceding subject is a problem by the constructing work that the restriction and the standard application has been strong. So the District Standard Planning had many problems. And also by the problems here, as a immoderate volition and stiffen about the operation, the system and equipment lack about the environment improving work, problems with areas by the exciting plannings, the attitude of the executive agency that can't accept the inhabitants will. From these backgrounds we thought the research has not to be standardize in only newtown concept, but has to breath with the exciting towns and the rural areas that the District Planning has been applied. And to revive the special quality of the area and local government by a positive and logical research. Consequently in this study, we researched about the problems of architectures that had issues with the District Standard Planning of architectural part of operation guide which has been assisted form Single-Detached House in Eomsa District Dooma-Myun Nonsan which is located in Chungnam province.

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Longitudinal Control Using Linear Quadratic Tracker with Integrator and Handling Qualities for Unmanned Rotorcraft (LQTI를 이용한 회전익 무인항공기 종방향 조종성 평가를 위한 제어법칙 설계 및 조종성 평가)

  • Lee, Changmin;Kim, Sungkeun;Jo, Seunghwan;Ra, Chunggil;Kim, Ki-joon;Suk, Jinyoung;Kim, Seungkeun
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.45 no.5
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    • pp.393-400
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    • 2017
  • A virtual simulation test program to carry out the handling qualities of unmanned Rotorcraft has developed by using the MATLAB GUIDE(Graphic User Interface Development Environment). The handling quality evaluation program based on ADS-33E contributes to design the flight control system and to evaluate handling qualities. In addition, Linear Quadratic Tracker with Integrator(LQTI) attitude controller based on Linear Quadratic Regulator(LQR) for to rotorcraft BO-105C and the effects of the handling qualities is analyzed change to weight matrices of the Q and R.

Characteristics and Quality Control of Precipitable Water Vapor Measured by G-band (183 GHz) Water Vapor Radiometer (G-band (183 GHz) 수증기 라디오미터의 가강수량 특성과 품질 관리)

  • Kim, Min-Seong;Koo, Tae-Young;Kim, Ji-Hyoung;Jung, Sueng-Pil;Kim, Bu-Yo;Kwon, Byung Hyuk;Lee, Kwangjae;Kang, Myeonghun;Yang, Jiwhi;Lee, ChulKyu
    • Journal of the Korean earth science society
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    • v.43 no.2
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    • pp.239-252
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    • 2022
  • Quality control methods for the first G-band vapor radiometer (GVR) mounted on a weather aircraft in Korea were developed using the GVR Precipitable Water Vapor (PWV). The aircraft attitude information (degree of pitch and roll) was applied to quality control to select the shortest vertical path of the GVR beam. In addition, quality control was applied to remove a GVR PWV ≥20 mm. It was found that the difference between the warm load average power and sky load average power converged to near 0 when the GVR PWV increased to 20 mm or higher. This could be due to the high brightness temperature of the substratus and mesoclouds, which was confirmed by the Communication, Ocean and Meteorological Satellite (COMS) data (cloud type, cloud top height, and cloud amount), cloud combination probe (CCP), and precipitation imaging probe (PIP). The GVR PWV before and after the application of quality control on a cloudy day was quantitatively compared with that of a local data assimilation and prediction system (LDAPS). The Root Mean Square Difference (RMSD) decreased from 2.9 to 1.8 mm and the RMSD with Korea Local Analysis and Precipitation System (KLAPS) decreased from 5.4 to 4.3 mm, showing improved accuracy. In addition, the quality control effectiveness of GVR PWV suggested in this study was verified through comparison with the COMS PWV by using the GVR PWV applied with quality control and the dropsonde PWV.

The Effects of Emotional Intelligence on the Customer Orientation and Customer Relationship Management Performance of Hotel Employees (호텔기업 종업원의 감성지능이 고객지향성과 CRM성과에 미치는 영향)

  • Jeon, Ta-Sik;Nam, Taek-Young
    • Journal of Distribution Science
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    • v.10 no.10
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    • pp.17-24
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    • 2012
  • Purpose - This study aimed to (a) investigate the effects of emotional intelligence on customer orientation, (b) examine the impact of customer orientation on customer relationship management (CRM) performance (including CRM-related variables such as 'relationship commitment,' 'image of corporation,' and 'customer loyalty'), and (c) identify the conceptual framework of emotional intelligence. Research design, data, and methodology - The data were collected using a questionnaire given to a sample of employees of luxury hotels in the metropolitan area. To test the hypotheses, AMOS were conducted for the 271 respondents of the sample using the SPSS Win 17.0 software. The concept of emotional intelligence (EI) has been on the radar of many leaders and managers over the past few decades. Emotional intelligence is generally accepted to be a combination of emotional and interpersonal competencies that influence behavior, thoughts, and interactions with others. Emotional intelligence consists of four factors: understanding the self's emotion, understanding other people's emotions, emotion utilization, and emotion control. Understanding the self's emotion means to understand of my own emotions. Understanding other people's emotions is to understand of the emotions of the people around me and to know how my friends feel based on their behavior. The concept of emotion utilization means to set goals for myself and then try to achieve them, encouraging myself to do my best. The concept of emotion control means I can control my temper, handle difficult situations rationally, and calm down quickly when I am very angry. Results - As a result of the analysis, three factors (understanding the self's emotion, understanding of other people's emotions, and emotion utilization) were shown to have a significant effect on customer orientation. Emotion control had an insignificant effect on customer orientation. Only emotion control makes it difficult to solve customers' problems because it is a passive behavior. In order to solve the customers' problems, hotel employees have to show a positive attitude. Second, customer orientation had a significant effect on customer relationship management performance (customer relationship commitment, corporate image, and customer loyalty). In other words, customer orientation increases commitment to customer relationships. For example, employees who have a customer-orientated perspective provide good service to their customers, while employees who don't have a customer-orientated perspective can't satisfy their customers. Customer orientation can also generate a good image among customers, because they evaluate the image of a hotel through the behavior of hotel employees. So it is very important for employees to show excellent customer orientation. Conclusions - It is very important for hotel CEOs to manage their employees' emotional intelligence. In order to increase their employees' emotional intelligence abilities, CEOs have to manage the overall corporate culture and reward programs to achieve what they want. This is because the system can lead to a customer-orientated mind-set and CRM performance among employees. As a result, the hotel CEO has to pay attention to the emotional intelligence of employees to achieve strong CRM performance. The sentence as originally written was a bit unclear. If this edit does not retain your intended meaning please consider: "Only emotion control does not have a significant impact on customer orientation, and therefore on the ability of an employee to solve customer problems, because it is a passive behavior." Please use the version of the sentence that best captures your original meaning.

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College Students' Attitude toward Body Weight Control, Health-related Lifestyle and Dietary Behavior by Self-perception on Body Image and Obesity Index (대학생의 체형인식과 비만도에 따른 체중조절 태도, 건강관련 생활습관 및 식행동)

  • Chin, Jeong-Hee;Chang, Kyung-Ja
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.34 no.10
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    • pp.1559-1565
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    • 2005
  • The Purpose of this study was to investigate college students' attitude toward body weight control, health-related lifestyle and dietary behavior by their perception on body image and obesity index. The subjects were 871 nation- wide college students (330 male and 541 female students) participating in a nutritional education program via internet- A cross-sectional survey was conducted using a self-administered questionnaire via internet. The data were analyzed by a SPSS 10.0 program. Height and weight (p < 0.05), and the distribution of obesity index (p < 0.001) showed significant differences between male and female college students. As for self perception on body image, the necessity of body weight control and the experience of efforts to change the body weight, there were significant differences between male and female college students (p < 0.001). There were significant differences among groups by obesity index in the hours of exercise (p < 0.01), drinking (p < 0.01) and smoking (P < 0.001). As for methods of body weight control, all the groups by obesity index thought that program of body weight control by diet company is the most desirable method. Therefore, we must recognize that it is hard to correct health problems resulting from wrong lifestyle and dietary behavior fixed during college life and prepare a system for college students to obtain correct lifestyle and dietary behavior.

A Concept for improving the Level of Autonomy of an LEO Satellite (저궤도 위성의 자율성 수준 향상을 위한 개념 제안)

  • Jeon, Moon-Jin;Kim, Eunghyun;Lim, Seong-Bin
    • Aerospace Engineering and Technology
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    • v.13 no.1
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    • pp.37-43
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    • 2014
  • The ground station which operates the LEO satellite performs monitoring state of health of the satellite, sending the commands for the imaging mission of receiving the images during about 10 minutes of contact time. To finish the planned procedure in limited contact time, specific level of autonomy is applied in the satellite and the ground system. For example, the attitude and orbit control logic has high level of autonomy because it must be operated alone for long period without operator intervention. On the other hand, the fault management logic has relatively low level of autonomy because of that failure detection and safing operation are performed on-board, whereas failure identification and recovery are on-ground operation. The level of autonomy of the satellite affects also the ground operation. The command set for mission operation is generated by ground system. If the satellite has higher level of autonomy, some of operation currently done on-ground can be performed on-board, so the ground operation can be simplified. In this paper, we discuss the level of autonomy and propose a concept for improving the level of autonomy of an LEO satellite.

MULTI-PHYSICAL SIMULATION FOR THE DESIGN OF AN ELECTRIC RESISTOJET GAS THRUSTER IN THE NEXTSAT-1 (차세대 인공위성 전기저항제트 가스추력기의 다물리 수치모사)

  • Chang, S.M.;Choi, J.C.;Han, C.Y.;Shin, G.H.
    • Journal of computational fluids engineering
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    • v.21 no.2
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    • pp.112-119
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    • 2016
  • NEXTSat-1 is the next-generation small-size artificial satellite system planed by the Satellite Technology Research Center(SatTReC) in Korea Advanced Institute of Science and Technology(KAIST). For the control of attitude and transition of the orbit, the system has adopted a RHM(Resisto-jet Head Module), which has a very simple geometry with a reasonable efficiency. An axisymmetric model is devised with two coil-resistance heaters using xenon(Xe) gas, and the minimum required specific impulse is 60 seconds under the thrust more than 30 milli-Newton. To design the module, seven basic parameters should be decided: the nozzle shape, the power distribution of heater, the pressure drop of filter, the diameter of nozzle throat, the slant length and the angle of nozzle, and the size of reservoir, etc. After quasi one-dimensional analysis, a theoretical value of specific impulse is calculated, and the optima of parameters are found out from the baseline with a series of multi-physical numerical simulations based on the compressible Navier-Stokes equations for gas and the heat conduction energy equation for solid. A commercial code, COMSOL Multiphysics is used for the computation with a FEM (finite element method) based numerical scheme. The final values of design parameters indicate 5.8% better performance than those of baseline design after the verification with all the tuned parameters. The present method should be effective to reduce the time cost of trial and error in the development of RHM, the thruster of NEXTSat-1.

A Study on Accurate Alignment Measurement of Dual Thruster Module Using Theodolite (데오드라이트를 이용한 이중 추력기 모듈의 정밀정렬측정에 관한 연구)

  • Hwang, Kwon-Tae;Moon, Guee-Won;Cho, Chang-Lae;Lee, Dong-Woo;Lee, Sang-Won
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.36 no.11
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    • pp.1399-1404
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    • 2012
  • Because satellites operate in space, it is impossible to repair them when they malfunction. Therefore, to ensure the normal function of the payload used in the satellites, accurate assembly and installation of parts are crucial. To prevent abnormal functioning in the extreme environments during launch and in space, it is essential to test changes at the parts and system levels by performing alignment measurement before and after the launch environment test and the space environment test. Recently, noncontact three-dimensional precision machinery for medium- and large-sized parts has been developed. One of these is the theodolite measurement system, which is widely used in the aerospace industry. This study measures the angle of the dual thruster module that is used to control the attitude of KOMPSAT by using a theodolite, and alignment measurement and a reliability analysis are performed.

Differences in Sexual Attitudes, Sexual Permissiveness and Sexual Behaviors among Female High School Students According to Mass Media Consumption (여자고등학생의 대중매체 소비에 따른 성태도, 성허용성, 성행동의 차이)

  • Jung, Seungmin;Kim, Hye-Jin
    • Journal of the Korean Society of School Health
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    • v.33 no.1
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    • pp.1-9
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    • 2020
  • Purpose: sexual permissiveness, sexual behaviors and the consumption of mass media in female high school students. Methods: 306 students, from three different girls' high schools in Seoul, who understood the purpose of the study, participated as subjects in the research. The research tools were the mass-media consumption scale, the sexual attitudes survey, the sexual permissiveness survey, and the sexual behaviors scale. The data were analyzed using descriptive analysis, t-test, ANOVA with SPSS/WIN. 18.0 program. Results: The subjects' daily mass media consumption was 143.7 minutes of TV watching on weekdays, while 253.9 minutes on weekends, 88.5 minutes of Internet surfing, 57.8 minutes of listening to pop music. Watching TV music programs was 68.3 minutes a week. Watching TV 'alone' was 30.7% and Internet surfing in one's 'own room' was the highest at 39.9%. The average score of sexual attitudes, sexual permissiveness, and sexual behaviors was 25.7/55, 35.4/64 and 0.7/10, respectively. Sexual attitudes and sexual permissiveness varied according to how much time they spent surfing the Internet, with whom they watched TV, and how much time they spent listening to popular music; and sexual behavior differed according to the time spent on the Internet. Conclusion: Educational programs need to be developed to help young people control their media consumption behaviors. In addition, political attention and a proper system are needed to promote a healthier and sounder pop culture through a public review system.

Autonomous Formation Flight Tests of Multiple UAVs (다수 무인항공기의 자동 편대비행 시험)

  • Song, Yong-Kyu;Heo, Chang-Hwan;Lee, Sang-Jun;Kim, Jung-Han
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.38 no.3
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    • pp.264-273
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    • 2010
  • In this work, autonomous formation flight tests of multiple UAVs are experimentally studied. After a guidance and control system for a UAV is designed and tested, PID formation controller for follower UAV is tested using longitudinal and lateral distance feedback. It is shown that more stable and efficient formation guidance system is obtained by using position and attitude of the leader aircraft, which is exploited to calculate virtual waypoint for follower. In order to improve transient response during turn, part of roll command of the leader is added to the guidance command. Finally, autonomous formation flight test results of 3 UAVs are shown by using the best guidance algorithm suggested.